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美***OMEGA歐米茄DRA-CSM-1電流復用器

將16個4-20 mA輸入多路復用成***個4-20 mA輸出

±0.01%精度

由4個離散輸入控制的信道選擇

固態(tài)技術

經濟型PLC升***

美國OMEGA歐米茄DRA-CSM-1電流復用器

DRA-CSM-1電流多路復用器是一種固態(tài)多路復用器，能夠在不到10微秒的時間內以高于0.01%的精度將選定的4-20 mA輸入電流信號傳輸到輸出終端。DRA-CSM-1通常由PLC控制，從而獲得完整的數據同步。DRA-CSM-1配有單元啟用/禁用控制線，該控制線可使多個多路復用器并行連接到同一控制器輸入。根據檢查設備硬件的自檢程序，禁用設備的周期用于自檢。DRA-CSM-1型由外部直流電源供電。每個兩線4-20 mA變送器連接到輸入終端。每個通道為連接的兩線發(fā)射機提供一個限流電壓電源。多路復用器選擇的信道被引導到控制設備（例如，PLC）的模擬輸入端。多路復用器向未選擇的信道保持功率，從而保持發(fā)射機電流不間斷流動。多路復用器上的每個4-20 mA輸入通道都有自己的紅色LED狀態(tài)燈，當回路中存在電流時，該燈就會亮起。

美***OMEGA歐米茄DRA-CSM-1電流復用器

Multiplexes Sixteen 4-20 mA Inputs Into One 4-20 mA Output

± 0.01% Accuracy

Channel Selection Controlled by 4 Discrete Inputs

Solid-State Technology

Economical PLC Upgrade

The DRA-CSM-1 Current Multiplexer is a solid state multiplexer capable of transferring the selected 4-20 mA input current signal to the output terminals in less than 10 microseconds at an accuracy better than 0.01%. The DRA-CSM-1 is typically controlled by a PLC thereby obtaining full data synchronization. The DRA-CSM-1 is provided with a unit enable/disable control line which enables the parallel connection of several multiplexers to the same controller input. The period during which the unit is disabled is used for self-testing according to a self-test procedure which checks the unit’s hardware. Model DRA-CSM-1 is powered by an external DC power supply. Each two-wire 4-20 mA transmitter is connected to the input terminals. Each channel provides a current limited voltage supply for the connected two-wire transmitter. The channel selected by the multiplexer is directed to the control device’s (e.g., PLC’s) analog inputs. Power is maintained by the multiplexer to the unselected channels thereby maintaining uninterrupted transmitter current flow. Each 4-20 mA input channel on the multiplexer has its own red LED status light which illuminates on presence of current in the loop.